National Highway Traffic Safety Administration (NHTSA) 2018 Accident Report

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Dataset Information

Our data set is a sample set of accidents and related accident data compiled by the National Highway Traffic Safety Administration (NHTSA) 2018. Our specific data set is comprised of data from the Crash Report Sampling System(CRSS). This data is a sample of police reported accident data relating to many different aspects of an accident, including pedestrian, motor vehicle, property, etc. Every year, there are more than 6 million reported accidents, and this data set compiles data on accidents that are “of greatest concern to the highway safety community and the general public”.

Objective

Our objective is to gain a deeper insight into different aspects of accident trends. We have focused on a few different areas of accidents, including alcohol use as it relates to other data, area of the US, and others.

General Accident Trends

The following graphs illustrate the accident trends for the hour of the day and for the day of the week.

Accident By Hour Of Day

Accidents By Day Of Week

Alcohol Use

Central Limit Theorem

## [1] "Population mean:  37.3305331448058  Population SD:  19.0429683609092"

## [1] "Population mean:  37.33  Population SD:  19.04"

## [1] "Sample size:  50 Sample Mean:  37.27 Sample SD 2.7"  
## [2] "Sample size:  100 Sample Mean:  37.32 Sample SD 1.92"
## [3] "Sample size:  150 Sample Mean:  37.34 Sample SD 1.53"
## [4] "Sample size:  200 Sample Mean:  37.34 Sample SD 1.34"